Irfani, Hadi, Rina Mariana, and Sitti Rizki Mulyani. 2021. “Coaching Strategy-Based for Raw Sweet Potato’s Small Medium Enterprise to Be Leading in Payakumbuh”. UPI YPTK Journal of Business and Economics 1 (1):39-46. https://doi.org/10.35134/jbe.v1i1.3.